Braiding machine



April 22, 1941. K. YASUDA 2,239,477

BRAIDING uAcHINE Filed Oct. 6, 1939 2 Sheets-Sheetl 8 f/fyasat'a/ Jy', I

K. YASUDA BRAIDING IACHINE Apr'ilz, 1941.

Filed Oct. 6, '1939 2 Sheets-Sheet 2 INVEN R,

BY M gm Patented Apr. 22, 1941 UNITED STATES PATENT OFFICE BRAIDIN'G MACHINE keinem Yasuda, Nakaku, Yokohama, Japan Application October 6, 1939, Serial No. 298,321

1 Claim.

This invention relates to a braiding machine comprising a helical member consisting of a rectifying portion at the free end, said portion having the same pitch as the distance between the successive teeth of a saw-toothed edge of a flnished braid, and a thread catcher or an opening at the other end, said helical member beingr fastened 'so as to rotate about its axis in the braiding position in a direction in relation to the movement of braiding carriers, whereby the iinished braid is delivered to a roll by the rotation of the helical member, the edges of the braid passing through the rectifying portion.y

Anobject of this invention is to produce various edges of braids by merely varying the speed of rotation of the helical member in relation to that of movement of the braiding carriers.

Another object of the invention is to provide a machine wherein the finished braid is delivered to a roll by the rotation of the helical member without any take-up spool.

Another object of this invention is to'enable the production of a braid which will not be deformed even when no. core threads are used.

Another object of this invention ls to dispense with the usual rectifying operations after braiding and also to produce braids with uniform meshes.

Another object of this invention is to obtain a machine of a simple construction whereby braids having various edges are obtained according to the pitch of the helical member.

The accompanying drawings illustrate a braidlng machine according to this invention, in which Fig. 1 is a plan view of the same, Fig. 2 a side view partly in section, Fig. 3 an enlarged side view of a device carrying a helical member, Fig. 4 a cross section showing the helical member held by a holder, Fig. 5 a front view of a pair of helical members holding threads between them, Fig. 6 is a perspective view of the holder forthe helical member, and Fig. '1 is a perspective view of a modification of the holder.

The features of the invention will be understood fromA the explanation given below referring to the drawings.

A helical member a of a suitable diameter consists of 'a rectifying portion I having the same pitch p as the distance between the successive braid is delivered to a roll, the edges of the braid passing through the rectifying portion.

The helical member a may be driven through a gearing or a flexible shaft or other suitable means in relation to the movement of braiding carriers, but in the example given below a gearing is used as the driving mechanism.

On a Base plate 3 there are provided tubular posts 5 through which shafts 5 are inserted, and tracks 24 forming peach-shaped portions 4. On the upper end of the shaft 5 is secured a bevel gear I engaging another bevel gear 1 nxed at the end of a shaft 5", said shafts 5 5 being held or connected by a connecting tube 6. At the lower portion of the shaft 5' is secured a gear 8 adapted, through gears 9 I 0, a short shaft II and a gear I2 to effect movement of the braiding carriers 20. The helical member a is fastened to the end of the shaft 5". Said member a .is provided at the lower end a bent portion I3 with a reduced pitch and the latter is secured to the end of the shaft 5 so that the rectifying portion I may be held in an inclined position. In order to hold the rectifying portion i in the proper position, a bearing Il as shown in Figs. 6 or 7 is disposed at the braiding point (Fig. 2). The bearing shown in Fig. 6 is provided with a projection IB at the middle of the front incline I5, the height of the projection I6 being nearly the same as the radius of the helical member. The rectifying portion I rests against the incline On the bearing I4 issecured with a screw I'I a cover I8 having a slot through which the braid is delivered. 'I'he modified form of bearing shown in Fig. '7 is provided with a holder piece I9 which is inserted in the rectifying portion I to hold the latter in position.

If the machine is so constructed that the heli- 1 cal member a makes one rotation per rotation of a braiding carrier, a braid with a uniform saw-toothed edge, of which the distance between the successive teeth is the same as the pitch p of the helical member, will be obtained. If it is so constructed that the helical member makes one rotation while two carriers make one rotation respectively, the threads will overlap so as to form an edge with overlapped teeth. Ii' the pitch of one of the pair of helical members is twice the pitch of the other and the speed of its rotation is half the speed of the latter, or if the rotation of the former is reduced to half the speed of the latter and an ordinary needle is used on the other side instead of the helical .of the helical member.

member according to this invention, braids with diierent edges will be produced.

According to this invention, the nished braid is delivered or conveyed to a roll by the rotation Therefore, it is unnecessary to draw it out by a spool and so, if

desired, core threads may be dispensed with.

Core threads may be used, if desired, by passing them between the helical members as shown in Fig. 5 through center holes of the nger `wheels 235, for exaxnpe.

As described above, varied edges of e, braid which could not 'be produced heretofore Without a special apparatus, are produced easily by siniply varying the speed of rotation of helical members in relation to the rnovemenil of braiding carriers. It is unnecessary, moreover, to draw out nished braids by means of the spools and ten sioning of the threads is thus avoided.

Having now particularly described and ascertained the nature of my said invention, and in what manner the same is to be performed, what I claim is:

In a braiding machine, a base plate having tracks therein, carriers movable in said tracks,

a drive shaft, a helical member secured at one end co said shaft, a holder having an inclined surface engaging and retaining the other end of the helical member in an inclined position, the edge of `eine nished braid being passed through and delivered by said helical member.

KENICHI; YASUDA. 

